/* ============================================================
   GYM Management System — Design System
   Premium dark theme with glassmorphism effects
   ============================================================ */

/* ─── CSS Custom Properties (Design Tokens) ──────────────── */
:root {
    /* Primary Palette */
    --primary-50: #eef2ff;
    --primary-100: #e0e7ff;
    --primary-200: #c7d2fe;
    --primary-300: #a5b4fc;
    --primary-400: #818cf8;
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --primary-800: #3730a3;
    --primary-900: #312e81;
    
    /* Accent / Success */
    --success-400: #4ade80;
    --success-500: #22c55e;
    --success-600: #16a34a;
    
    /* Warning */
    --warning-400: #fbbf24;
    --warning-500: #f59e0b;
    --warning-600: #d97706;
    
    /* Danger */
    --danger-400: #f87171;
    --danger-500: #ef4444;
    --danger-600: #dc2626;
    
    /* Info */
    --info-400: #38bdf8;
    --info-500: #0ea5e9;
    --info-600: #0284c7;
    
    /* Neutrals (Dark Theme) */
    --bg-primary: #0f0f1a;
    --bg-secondary: #161625;
    --bg-tertiary: #1e1e32;
    --bg-card: rgba(30, 30, 50, 0.7);
    --bg-card-hover: rgba(40, 40, 65, 0.8);
    --bg-input: rgba(20, 20, 38, 0.8);
    
    --border-color: rgba(99, 102, 241, 0.15);
    --border-color-hover: rgba(99, 102, 241, 0.3);
    --border-color-focus: var(--primary-500);
    
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-white: #ffffff;
    
    /* Glassmorphism */
    --glass-bg: rgba(30, 30, 50, 0.6);
    --glass-border: rgba(99, 102, 241, 0.12);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --glass-blur: blur(16px);
    
    /* Sidebar */
    --sidebar-width: 260px;
    --sidebar-collapsed: 72px;
    --sidebar-bg: rgba(15, 15, 26, 0.95);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.15);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.8125rem;
    --font-size-base: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
}

/* ─── Reset & Base ───────────────────────────────────────── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background gradient orbs */
body::before {
    content: '';
    position: fixed;
    top: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}

body::after {
    content: '';
    position: fixed;
    bottom: -20%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}

a {
    color: var(--primary-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-300);
}

img {
    max-width: 100%;
    height: auto;
}

/* ─── App Layout ─────────────────────────────────────────── */
.app-layout {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition-base);
}

.page-content {
    flex: 1;
    padding: var(--space-lg) var(--space-xl);
}

/* ─── Sidebar ────────────────────────────────────────────── */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: width var(--transition-base), transform var(--transition-base);
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--glass-border);
    min-height: 64px;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.sidebar-logo i {
    width: 28px;
    height: 28px;
    color: var(--primary-400);
    filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.4));
}

.sidebar-brand {
    font-size: var(--font-size-xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-400), var(--primary-300));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.1);
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-md) 0;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: var(--space-md);
}

.nav-section-title {
    display: block;
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-lg);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: 0;
    margin: 1px 0;
    position: relative;
    transition: all var(--transition-fast);
}

.nav-link i {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.08);
}

.nav-link.active {
    color: var(--primary-400);
    background: rgba(99, 102, 241, 0.12);
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-400), var(--primary-600));
    border-radius: 0 2px 2px 0;
}

.sidebar-footer {
    border-top: 1px solid var(--glass-border);
    padding: var(--space-md) var(--space-lg);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) 0;
    margin-bottom: var(--space-sm);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-sm);
    color: white;
    flex-shrink: 0;
}

.user-info {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.user-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.user-role {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.logout-link {
    color: var(--danger-400) !important;
    margin: 0;
    padding: var(--space-sm) 0 !important;
}

.logout-link:hover {
    color: var(--danger-500) !important;
    background: transparent !important;
}

/* ─── Top Header ─────────────────────────────────────────── */
.top-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-xl);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 50;
    min-height: 64px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
}

.page-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.header-date {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.header-date i {
    width: 16px;
    height: 16px;
}

/* ─── Cards ──────────────────────────────────────────────── */
.card {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    border-color: var(--border-color-hover);
    box-shadow: var(--shadow-glow);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--glass-border);
}

.card-title {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.card-title i {
    width: 20px;
    height: 20px;
    color: var(--primary-400);
}

.card-body {
    padding: var(--space-lg);
}

/* ─── Stat Cards ─────────────────────────────────────────── */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    transition: all var(--transition-base);
    box-shadow: var(--glass-shadow);
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-color-hover);
    box-shadow: var(--shadow-glow);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon i {
    width: 24px;
    height: 24px;
}

.stat-icon-blue {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-400);
}

.stat-icon-green {
    background: rgba(34, 197, 94, 0.15);
    color: var(--success-400);
}

.stat-icon-purple {
    background: rgba(139, 92, 246, 0.15);
    color: #a78bfa;
}

.stat-icon-orange {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning-400);
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
}

/* ─── Dashboard Grid ─────────────────────────────────────── */
.dashboard-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

/* ─── Quick Actions ──────────────────────────────────────── */
.quick-actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-md);
}

.quick-action {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: var(--bg-input);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
}

.quick-action i {
    width: 24px;
    height: 24px;
    color: var(--primary-400);
    transition: transform var(--transition-fast);
}

.quick-action:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary-500);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.quick-action:hover i {
    transform: scale(1.15);
}

/* ─── System Info Grid ───────────────────────────────────── */
.system-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-md);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.info-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
}

/* ─── Badges ─────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    width: fit-content;
}

.badge-primary {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-400);
}

.badge-success {
    background: rgba(34, 197, 94, 0.15);
    color: var(--success-400);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning-400);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger-400);
}

.badge-info {
    background: rgba(14, 165, 233, 0.15);
    color: var(--info-400);
}

/* ─── Buttons ────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 10px 20px;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
}

.btn i {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    color: var(--text-white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
    transform: translateY(-1px);
    color: var(--text-white);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-color-hover);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-500), var(--danger-600));
    color: var(--text-white);
}

.btn-danger:hover {
    background: linear-gradient(135deg, var(--danger-400), var(--danger-500));
    transform: translateY(-1px);
    color: var(--text-white);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-500), var(--success-600));
    color: var(--text-white);
}

.btn-success:hover {
    background: linear-gradient(135deg, var(--success-400), var(--success-500));
    transform: translateY(-1px);
    color: var(--text-white);
}

.btn-sm {
    padding: 6px 12px;
    font-size: var(--font-size-xs);
}

.btn-block {
    width: 100%;
}

.btn-group {
    display: flex;
    gap: var(--space-sm);
}

/* ─── Form Elements ──────────────────────────────────────── */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.form-label i {
    width: 16px;
    height: 16px;
    color: var(--primary-400);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 10px 14px;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    outline: none;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--border-color-focus);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-error {
    display: block;
    margin-top: var(--space-xs);
    font-size: var(--font-size-xs);
    color: var(--danger-400);
}

.input-with-icon {
    position: relative;
}

.input-with-icon .form-input {
    padding-right: 44px;
}

.input-icon-btn {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast);
}

.input-icon-btn:hover {
    color: var(--text-primary);
}

.input-icon-btn i {
    width: 18px;
    height: 18px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

/* ─── Tables ─────────────────────────────────────────────── */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.table th {
    text-align: left;
    padding: var(--space-md) var(--space-lg);
    font-weight: 600;
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    background: rgba(15, 15, 26, 0.5);
    border-bottom: 1px solid var(--glass-border);
    white-space: nowrap;
}

.table td {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-primary);
    vertical-align: middle;
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover td {
    background: rgba(99, 102, 241, 0.04);
}

.table-actions {
    display: flex;
    gap: var(--space-sm);
    white-space: nowrap;
}

/* ─── Alerts ─────────────────────────────────────────────── */
.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    margin: var(--space-md) var(--space-xl);
    font-size: var(--font-size-sm);
    animation: slideDown 0.3s ease;
}

.alert i {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.2);
    color: var(--success-400);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--danger-400);
}

.alert-close {
    margin-left: auto;
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    padding: 2px;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.alert-close:hover {
    opacity: 1;
}

.alert-close i {
    width: 16px;
    height: 16px;
}

.error-list {
    list-style: none;
    margin-top: var(--space-xs);
}

.error-list li {
    padding: 2px 0;
}

/* ─── Pagination ─────────────────────────────────────────── */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-lg) 0;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.pagination a {
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
}

.pagination a:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary-500);
    color: var(--primary-400);
}

.pagination .active {
    background: var(--primary-600);
    color: var(--text-white);
    border-color: var(--primary-500);
}

/* ─── Login Page ─────────────────────────────────────────── */
.login-body {
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

.login-brand {
    flex: 1;
    background: linear-gradient(135deg, var(--primary-900), var(--bg-primary), #1a1040);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    position: relative;
    overflow: hidden;
}

.login-brand::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 30%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse-slow 8s ease-in-out infinite;
}

.login-brand::after {
    content: '';
    position: absolute;
    bottom: 10%;
    right: 20%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse-slow 6s ease-in-out infinite reverse;
}

.brand-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 400px;
}

.brand-icon {
    margin-bottom: var(--space-xl);
}

.brand-icon i {
    width: 64px;
    height: 64px;
    color: var(--primary-400);
    filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.4));
}

.brand-content h1 {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-300), var(--primary-100));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-md);
}

.brand-content p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

.brand-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.brand-feature {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.brand-feature i {
    width: 18px;
    height: 18px;
    color: var(--primary-400);
}

.login-form-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    max-width: 520px;
}

.login-form-wrapper {
    width: 100%;
    max-width: 400px;
}

.login-header {
    margin-bottom: var(--space-xl);
}

.login-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.login-header p {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.login-form .alert {
    margin: 0 0 var(--space-lg) 0;
}

.login-footer {
    margin-top: var(--space-xl);
    text-align: center;
}

.login-footer p {
    color: var(--text-muted);
    font-size: var(--font-size-xs);
}

/* ─── Error Pages ────────────────────────────────────────── */
.error-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.error-container {
    text-align: center;
}

.error-code {
    font-size: 120px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-400), var(--primary-700));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--space-md);
}

.error-container h1 {
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.error-container p {
    color: var(--text-muted);
    margin-bottom: var(--space-xl);
}

/* ─── Empty State ────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-muted);
}

.empty-state i {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.empty-state p {
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-lg);
}

/* ─── Animations ─────────────────────────────────────────── */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse-slow {
    0%, 100% {
        opacity: 0.5;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.1);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ─── Responsive & Mobile Drawer ─────────────────────────── */
.sidebar-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 990;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.sidebar-backdrop.show {
    display: block;
    opacity: 1;
}

body.sidebar-open {
    overflow: hidden;
}

@media (max-width: 1024px) {
    html, body, .app-layout, .main-content {
        max-width: 100vw;
        overflow-x: hidden;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 280px;
        max-width: 85vw;
        height: 100vh;
        z-index: 1000;
        transform: translateX(-100%);
        box-shadow: 0 0 40px rgba(0, 0, 0, 0.75);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0 !important;
        width: 100%;
        min-width: 0;
    }
    
    .mobile-menu-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 42px;
        height: 42px;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid var(--glass-border);
        border-radius: var(--radius-md);
        color: var(--text-primary);
        cursor: pointer;
        transition: all var(--transition-fast);
    }

    .mobile-menu-btn:hover, .mobile-menu-btn:active {
        background: rgba(99, 102, 241, 0.15);
        border-color: var(--primary-500);
        color: var(--primary-400);
    }

    .mobile-menu-btn i, .mobile-menu-btn svg {
        width: 22px;
        height: 22px;
        pointer-events: none;
    }

    .top-header {
        padding: 12px 16px;
        gap: 12px;
    }

    .header-left {
        min-width: 0;
        flex: 1;
        gap: 10px;
    }

    .page-title {
        font-size: 16px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .login-brand {
        display: none;
    }
    
    .login-form-container {
        max-width: 100%;
    }
}

@media (max-width: 992px) {
    .dashboard-grid {
        display: flex !important;
        flex-direction: column !important;
        gap: 16px;
    }
}

/* ─── Page Toolbars & Search ─────────────────────────────── */
.page-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.toolbar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.search-form {
    display: flex;
    align-items: center;
    gap: 6px;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input-wrapper .search-icon {
    position: absolute;
    left: 12px;
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    pointer-events: none;
}

.search-input-wrapper .form-input {
    padding-left: 36px;
    min-width: 220px;
    height: 42px;
}

@media (max-width: 768px) {
    .page-content {
        padding: 16px 12px;
        width: 100%;
        max-width: 100vw;
        box-sizing: border-box;
    }
    
    .stats-row {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    
    .alert {
        margin: 12px;
    }

    .page-toolbar, .flex-between {
        flex-direction: column;
        align-items: stretch !important;
        gap: 12px;
    }

    .toolbar-actions {
        width: 100%;
        flex-direction: column;
        gap: 8px;
    }

    .search-form {
        width: 100%;
    }

    .search-input-wrapper {
        width: 100%;
    }

    .search-input-wrapper .form-input {
        width: 100%;
        min-width: 0;
    }

    .toolbar-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .dashboard-grid {
        display: flex !important;
        flex-direction: column !important;
        gap: 16px;
    }

    .card {
        max-width: 100%;
        border-radius: 12px;
    }

    .card-body {
        padding: 16px 14px;
    }

    .card-header {
        padding: 14px 16px;
    }

    .header-date {
        display: none;
    }
}

@media (max-width: 480px) {
    .stats-row {
        grid-template-columns: 1fr;
    }
    
    .quick-actions-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .flex-between > div:last-child .btn {
        flex: 1 1 100%;
        width: 100%;
    }
}

/* ─── Pagination Component ───────────────────────────────── */
.pagination-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-top: 1px solid var(--glass-border);
    background: rgba(15, 15, 26, 0.3);
    flex-wrap: wrap;
    gap: 12px;
}

.pagination-info {
    font-size: 13px;
    color: var(--text-muted);
}

.pagination-info strong {
    color: var(--text-primary);
}

.pagination-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}

.pagination-pages {
    display: flex;
    align-items: center;
    gap: 4px;
}

.pagination-btn,
.pagination-page {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-input);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.pagination-page {
    padding: 0;
    width: 36px;
}

.pagination-btn i,
.pagination-btn svg {
    width: 16px;
    height: 16px;
}

.pagination-btn:hover:not(.disabled),
.pagination-page:hover:not(.active) {
    background: rgba(99, 102, 241, 0.15);
    border-color: var(--primary-500);
    color: var(--text-white);
}

.pagination-page.active {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    border-color: var(--primary-500);
    color: #ffffff;
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.35);
}

.pagination-btn.disabled {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}

.pagination-ellipsis {
    padding: 0 6px;
    color: var(--text-muted);
    font-size: 14px;
}

@media (max-width: 600px) {
    .pagination-container {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .pagination-btn-text {
        display: none;
    }

    .pagination-btn {
        width: 36px;
        padding: 0;
    }
}